Gear finishing machine



Feb. 12, 1946. R a U MQND 2,394,757

GEAR FINISHING MACHINE Filed March 23, 1942 19 Sheets-Sheet 1 FiGJ.

INVENTOR.

ROBERT S.DRUMMOND ATTORNEYS Feb. 12, 1946. R. s. DRUMMOND GEAR FINISH ING MACHINE Filed March is, 1942 19 Sheets-Sheet 2 INV EN TOR.

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ATTORNEYS 1765- 1946- R. s. DRUMMOND GEAR FINISHING uAciiInE Filed March 23; 1942 i9 Sheets-Skeet 12 Feb. 12, 1946; DRUMMOND 2,394,757

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19 sheets-sheet 14 Filed March 23 1942 ,n 220 I u 22| INVENTOR. ROBERT $.DRUMMOND BY I ATTORNEYS Feb. 12, 1946. R. s. D'RUMMOND 2,394,757

GEAR FINISHING MACHINE Filed March 23, 1942 19 Sheets-Sheet 15 INVENTOR. I ROBERT $.DRUMMOND ATTORNEYS Filed March 23, 1942 9 Sheets-Sheet 16 ll l INVENTOR. ROBERT S. DRUMMQND ATTORNEYS Feb. 12', 1946.

R. s. DRUMMOND GEAR FINISHING MACHINE- Filed March 23, 1942 19 Sheets- Sheet 17 ATTORNEYS Feb. 12 1946. R. S/DRUMMOND GEAR FINISHING MACHINE 1942 19 Sheets-Sheet 18 Filed March 23 INVEN TOR.

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ATTORN YS Patented Feb. 12, 1946 GEAR FINISHING MACHINE Robert S. Drummond, Detroit, Mich, minor to National Brooch & Machine Company, a corporation of Michigan Application March 23, 1942, Serial No. 435,891

4 Claims.

The present invention relates to a gear flnishing machine in which a work gear to be finished (Cl. sc -1.0)

is mounted for meshed rotation with a gearlike cutter, with the axes of the gear and cutter crossed at an angle preferably between 3 and 30; and in which relative translation is introduced between the gear and tool to distribute the finishing action of the tool longitudinally of the gear teeth, while at the same time the tool and gear are intermittently fed toward each other; and a relative rocking motion is or may be introducedbetween the gear and tool in timed relation tothe said relative translation, in order to produce a longitudinally curved or crowned profile shape to the'teeth oi the gear.

It is an object of the present invention to provide a machine of the type described in which the work support is mounted for rocking movement, and such rocking movement is transmitted thereto by a connection between the work support and a tool slide or carriage.

vided for the base and work support for the reception 01 a centering pin to prevent rocking movement of the work support where desired.

It is a further object of the invention to provide, in a machine of the type described, novel feeding means actuated upon relative reciprocation between the tool support and the work suppo It vide a worksupport and tool support mounted is a further object of the invention to profor relative translation in combination with an adjustable sine bar mechanism associated with one of said supports, and connections between said sine bar mechanism and the other-oi said supports for rocking one of said supports in timed relation to relative translation between said supports.

It is a further object of the invention to provide a machine tool of the character described constructed and arranged to permit lowering into 1 be apparent conjunction with the accompanying wherein: Figure 1 is a front elevation of the machine; Figure 2 is a side elevation of the machine, looking to the left in Figure 1;

Figure 3 is a side elevation of the machine, looking to the right in Figure 1;

Figure 4 is a top plan view of the machine; Figure Sis a front elevation of a subassembly,

including the base and work table;

Figures 6 and 6a together comprise a top plan of the subassembly made up of the base, work table, and cutter carriage;

Figure 7 is a section on the line 1-1, Figure 6;

Figure 8 is a section on the line 8-8, Figure 6;

Figure 9 is a rear elevation of a subassembly comprising the base and work carriage;

\ Figure 10 is a side elevation of a subassembly comprising the base, work table, and cutter carriage, looking to the right of Figure 9;

Figure ll is a side elevation of the tool slide;

Figure 12 is a top plan view of the tool slide; 1 Figure 12a is a diagrammatic sectional view illustrating measuring means for the head setting; v Figure .13 is a section on the line l3-I3, Figure 11;

Figure 14 is a front elevation of the tool slide;

Figure 15 is a front elevation'of the work tail-.

stock; r Figure 16 is a side elevation of the work tailstock, looking to the left 01 Figure 15;

Figure. 17 is a plan view of the work tailstock; Figure 18 is a. section on the line I8l8, Figure 15; Figure 19 is a si stock;

Figure 20 is a rear el de elevation of the work headstock, also. showing the power actuated hood stock;

23-23, Figure 20; T

mechanism;

Figure 21 is a top plan view of the work head- Flgure 22 is a vertical section on the line 22-22, Figure 19;

Figure 23 is a horizontal section on the line Figure 24. is a horizontal section on the line "-14, Figure 20;

Figure 25 is a fragmentary vertical section on the line 25-25, Figure 19;

Figure 26 is an enlarged rear-elevation of the cross feed drive mechanism;

Figure 27 isa fragmentary section, looking toward thecross feed drive mechanism, as indik en in cated by the arrows 21-21, Figure 26;

drawings,

evation of the work head- 

